Cosmo Router generates smaller Subgraph Queries compared to Apollo Router, resulting in a performance improvement of up to 25% without changing a single line of code in the Subgraph. The Cosmo Router's approach to Query Planning involves AST Minification, which reduces the size of the Query by extracting common Selection Sets into Fragments and removing unnecessary fields and directives. The algorithm is stable and deterministic, making it easy to test and verify its correctness. By applying this optimization, users can reduce their spend on Subgraph Infrastructure and achieve faster Response Times, leading to better User Experiences, higher Conversion Rates, and ultimately more Revenue.